Electric riveting apparatus.



N. MACNEALE.

ELECTRIC RIVETING APPARATUS.

APPLICATION FI'LED SEPT- 26. 1916. 1,297,966. Patented Mar. 18,1919.

2 SHEETSSHEET l.

am-4M A ATTORNEYJ' N. MACNEALE.

ELECTRIC RIVETING APPARATUS.

APPLICATION FILED SEPT.26, 1916.

2 SHEETS-SHEET 2- INVENTOR UNITED STATES PATENT OFFICE.

NEIL MACNEALE, 0F CINCINNATI, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, T0

THOMSON ELECTRIC WELDING COMPANY, OF LYNN, MASSACHUSETTS, A CORPO- RATION OF MASSACHUSETTS.

ELECTRIC RIVETING APPARATUS.

Specification of Letters Patent.

Patented Mar. 18, 1919.

Application filed September 26, 1916. Serial No. 122,188.

of Ohio, have invented certain new and use:

ful Improvements in Electric Riveting Apparatus, of which the following is a full, clear, and exact specification.

The principal object of my invention is to provide a new and improved machine for heading rivets after first heating them electrically. Another object of my inven tion is to provide a riveting machine With an electrode and a riveting die that may be applied successively, the electrode to complete an electric circuit through the rivet to heat it, and the die to be applied thereafter to head the rivet. Still another object of my invention is to provide an electric riveting machine with an anvil to receive the head of the rivet and two other members adapted to engage the rivet alternatively, one of them an electrode for heating the rivet, the other a riveting die, one of these members being displaceable laterally so as to facilitate the alternative application of either such member to the rivet. All these objects and others will be apparent in the following specification and claims taken with the accompanying drawings, in whichI have illustrated one specific embodiment of my invention. 'It will be understood that the invention is defined in the appended claims.

I now proceed to describe the particular embodiment of my invention which is shown in the drawings.

Figure 1 is a side elevation of this embo iment of my invention; and

1 1g. 2 is a partial front elevation, together with a diagram of the electric circuits in volved.

The frame 11 carries a bracketed support 12, on which is the anvil 13 ada ted to receive the head of the rivet 15. pposed to the anvil 13 is a sliding member 16 confined by the guides 17. Carried on the frame 11 is a transformer 46, and one terminal of its secondary is connected by the conductor 47 to the support. 12 for the anvil 13, the other terminal of the secondary being connected by the conductor 48 to the slide 33 within the member 16. The sliding member 16 is adapted to be reciprocated up and down,

that is,'from and toward the anvil 13, by the rotation of the shaft 19 which carries the fly wheel 18. The shaft 19' and fly wheel 18 rotate continuously and a clutch 44 of suitable form is provided, the engagement of which causes the rotation of the shaft 19 to reciprocate the member 16, as just stated. This clutch 44 is suitably controlled by the arm 20 and link 21, the lower end of which has a pin in the slot 22 on the end of the lever 24, which has its fulcrum at 23. The lever 24'is operated by the handle 25.

The reciprocating member 16 has a hollow interior which is partially closed by the front plate 32, and within is a slide .33 normally held up by the springs 35. The slide 33 is connected to the lever 24 by the links 34, and in a recess at its lower end there is seated an electrode-carrying member 36 with the copper electrode 37 fixed in its lower end.

Horizontal transverse guides 45 are fixed on the lower end of the sliding member 16 and carry the transversely movable block 38 with the rivet-heading die 26 on its lower side. The springs 27 tend to throw the die carrying member 38 forward but may be opposed by the lever 29 fulcrumed on the member'16 at 28, with one end engaging the pin 31 on the die-carrying member 38 and the other end engaging the stud 30 on the frame 11 of the machine.

The handle 25 carries a switch .in circuit with the magnet 40 and controllable by the thumb-operated button 39. hen the magnet 40 is energized, its armature 41 is attracted and closes at 42 the primary circuit from the alternator 43 to the transformer 46.

Assuming that the two metal plates 14 are to be secured together by the rivet 15,

of the handle By reason of the connection through the links 34, this movement depresses the slide 33 and applies the electrode 37 to the upper end of the rivet 15, thus closing the secondary circuit of the transformer 46 through the electrodes 13 and 37 and the interposed rivet 15. Next, a pressure with the thumb on the button 39 energizes the magnet 40 and closes at 42 the primary circuit of the transformer 46, causing a current to How in its secondary that heats the rivet 15. When this is heated sufiiciently for heading, the switch 39 is opened and the handle 25 raised. During the downward movement of the handle 25, no movement was communicated to the link 21 because of the slot 22, but a continued upward movement of the handle 25 finally pulls down on the link21 and engages the clutch 44:. Thereupon the member 16 is forced downward. This does not affect the lever 24: because the connecting link 34 is slotted, as shown in Fig. 1.

As the member 16 begins its'descent, the end of the lever 29 leaves the projection 30 and permits the springs 27 quickly to throw the die'26 over in'alinement with the end of the rivet 15. The further descent of the member 16 brings the die 26 into engagement with the end of the rivet 15 and heads it. On the completion of this operation, the handle 25 is lowered slightly to the position shown in Fig. 1, thus disengaging the clutch 44. This completes a cycle of operations for heading a rivet.

It will be seen that only one operating handle is provided and that by means-of this handle and the thumb switch therein contained, the entire control of the machine can be effected, leaving the other hand of the operator free to manipulate the work 14. Whenever the clutch 4A is disengaged, the

slide 16will, be up and the lever 29 will engage the button 30 and displacethe die 26 so that the electrode 37 can be applied to the rivet 15.- But whenever the power is applied through the clutch 44 to depress the member 16, the die 26 will quickly shift to operative position. There can be no interferencein the two operations of applying the electrode and the die, because they areaccomplished respectively by movements in opposite directions of the handle 25.

I claim:

1. In an electric riveter, an electrode anvil to receive the'head of a rivet, an opposed member movable to or from the anvil, an electrode movable -to-or from the anvil in alinement therewith, a riveting die mounted on said member and adapted to be displaced laterally relatively to said member and in one position to be brought between said anvil and said electrode, and means to supply an electric current through said electrodes and an interposed rivet.

2. In an electric riveter, an electrode anvil to receive the head of a rivet, anvopposed member movable to or from the anvil, an electrode mounted in said opposed member and -movable relatively thereto toward or from the anvil, a riveting die also mounted on said member and adapted to be displaced laterally relatively to said member and in one position to be brought between said anvil and said/electrode, and means to supply an electric current through said electrodes and an interposed rivet.

3. In an electric riveter, an electrode anvil electrode movable to or from the anvil in alinement therewith, a riveting die mounted on said member and adapted to be displaced laterally relatively to said member and in one position to be brought between said anvil and said electrode, means to shift Said riveting die into alinement with the anvil as the die approaches the anvil and out of alinement as it recedes, and means to supply an electric current through saidelectrodes and an interposed rivet.

4. In an electric riveter, an electrode anvil to receive the .head of a rivet, an opposed member movable to or from the anvil, an electrode movable to or from the anvil in alinement therewith, a riveting die mounted on said member and adapted to be displaced laterally thereon, means to apply power to move said die toward said anvil, automatic means .to shift the die into alinement with the anvil as it approaches and out of alinement as it recedes, and means to supply an electric current through said electrodes and van interposed rivet.

5. In an electric riveter, an electrode anvil to receive the head of a I'lVBt, an opposed member movable to or from the anvil, an

electrode movable to or from the anvil in direction to apply said source of power to force the said member toward the anvil, a

riveting die mounted on said member, and

adapted automatically to be displaced into alinement with the anvil as it approaches the anvil and out of alinement as it recedes,

and means to supply an electric current through said electrodes and an interposed rivet.

6. In an electric riveter, an electrode anvil to receive the head of the rivet, an opposed member movable to or from the anvil, an electrode movable to or from the anvil and in alinement therewith, a riveting die mounted on said member and adapted to be displaced laterally relatively to said member and in one position to be brought between said anvil and said electrode, a lever having a normal intermediate position, means actuated by the movement of the lever in one way from said intermediate position to move the electrode toward the anvil, means operated by the movement of the lever the other way from its normal position to force the die toward the anvil, automatic means to shift the die into alinement with the anvil as it approaches and out of alinement as it recedes, and means to supply an electric current through said electrodes and an interposed rivet.

7. In an electric riveter, an electrode anvil to receive the head of a rivet, an opposed member movable to or from the anvil, an electrode movable to or from the anvil in alinement therewith, a riveting die mounted on said member and adapted to be displaced laterally relatively to said member and in one position to be brought between said anvil and said electrode, means to supply an electric current through said electrodes and an interposed rivet, a lever adapted to control the movement both of said opposed member carrying the die and of said movable electrode, a handle on said lever'and a control switch for the electric current in said handle.

8. In an electric riveter, an electrode anvil to receive the head of a rivet, an electrode.

and a riveting die adapted interchangeably to engage the rivet on said anvil, a hand lever and means controlled by one movement of said lever to apply said electrode to the rivet and by another movement of said lever to apply said riveting die thereto.

9. In an electric riveter, an electrode anvil to receive the head of a rivet, an electrode and a riveting die adapted interchangeably to engage the rivet on said anvil, a hand lever, a source of power and means controlled by one movement of said lever to apply said electrode to the rivet and by another movement of said lever to apply the said source of power to said riveting die to cause it to engage the rivet.

10. In an electric riveter, an electrode anv il to receive the head of a rivet, an electrode and a riveting die adapted interchangeably to engage the rivet on said anvil, a hand lever and means controlled by n'iovement'of the lever in one direction from an intermediate position to cause the application of said electrode to a rivet on said anvil and by the. movement of said lever the opposite way from its intermediate position to cause the application of said riveting die to such a rivet.

11. In an electric riveter. an electrode anvil to receive the head of a rivet. an electrode and a riveting die adapted interchangeably to engage the rivet on said anvil, a hand lever having a connection to actuate said electrode effective one Way from the intermediate position of the lever, but permitting lost motion the other way and said lever having a connection to actuate the riveting die the opposite Way from its intermediate position, but permitting lost motion'the other Way.

12. In an electric riveter, an electrode anvil to receive the head of a rivet, an electrode and a riveting die adapted interchangeably to engage a rivet on said anvil, an electric circuit adapted to be closed through said electrode and anvil and an interposed rivet,

a hand lever adapted by one movement to.

engage the electrode With a rivet on the anvil and by another movement to engage the rivet-mg die with such rivet and a controller for said circuit mounted in the handle of said lever.

13. In an electric riveter an electrode an vil.to receive the head of the rivet, an electrode and a. riveting die adapted interchangeably to engage the rivet on said anvil, means to apply said electrode to the rivet, means to apply the riveting die to the rivet, and a hand lever adapted by movement one Way from an intermediate position to actuate one means and by movement the other way from said intermediate position to actuate the other means.

14. In an electric riveter an electrode anvil to receive the head of the rivet, an electrode and a riveting die adapted interchangeably to engage the rivet on said anvil, a hand lever, means controlled by one movement of said lever to apply said electrode to the rivet and by another movement of said lever to apply said riveting die thereto, means to send an electric current through said anvil and electrode and an interposed rivet to heat the latter, and a control switch in said hand lever.

In testimony whereof I aiiix my signature in presence of two Witnesses.

NEIL MACNEALE.

Witnesses A. J. GALLAGHER, LEONA LAMOTT. 

